Pippa's bum - really down to Pilates?

There's been a lot of hype around Pilates since it came out that Pippa M's bum in that dress was all down to her weekly Pilates sessions. Is there any truth in it? As a Pilates instructor myself I can confirm that it can do wonders for your derriere - particularly if you don't want to bulk up the area but want a peachy pert perfect behind! Try this exercise below every day for a week and see if you notice a difference: The heel squeeze Lying on your front, turn your legs out and bend your legs into a diamond shape with your heels together, toes turned out. Breathe in pulling in your tummy and as you breathe out squeeze your heels together as hard as you can holding for three seconds. Release and then repeat 12-15 times.